baber/WOPTO huggingface dataset:
Patent GB-763520-A (GB)
Title: Production of substituted pyridines
Filed: 1954-07-23
Abstract: A reaction product comprising a vinylpyridine is prepared by catalytic reaction between formaldehyde and a methyl-substituted pyridine, the latter being heated to at least 150 DEG  C. and the formaldehyde then being introduced so that it reacts at at least 150 DEG  C. and under super-atmospheric pressure, the reaction product being thereafter rapidly cooled.  The term " a methyl-substituted pyridine " includes pyridines containing additional substituents such as 2-methyl-5-ethyl pyridine and methyl benzo-pyridines, i.e. methyl quinolines.  The reaction is particularly applicable to pyridines having a methyl-substituent in the 2-, 4- or 6-position. Suitable catalysts are, for example, a persulphate, a peroxide such as benzoyl peroxide, or a strong acid such as sulphuric or phosphoric acid, a preferred catalyst being ammonium persulphate used in an amount equal to 0.05 to 2 mol. per cent based on the formaldehyde.  The formaldehyde may be supplied as a gas under pressure, as paraformaldehyde or as a formaldehyde solution, a 35-40 per cent by weight aqueous solution being preferred and the amount used being preferably 1 mol. per mol. of methyl pyridine. Advantageously, added solvents are absent but solvents such as pyridine, quinoline alcohols or water may be added.  Optimum results are obtained at 240-260 DEG C.  It is necessary to use relatively high pressures, e.g. 400-1500 p.s.i., and the formaldehyde is advantageously added within at most about 60 minutes, and preferably within 10-15 minutes.  A polymerization inhibitor, e.g. hydroquinone, t.-butylcatechol or trinitrobenzene, may be added.  The reaction products are preferably cooled to below 100 DEG  C. within 5 minutes of completion of the formaldehyde addition.  In an example, 3.8 mols. of 2-methyl - 5 - ethyl - pyridine, 0.014 mol. of ammonium persulphate and 0.009 mol. of hydroquinone are heated under pressure to 250 DEG  C. and 3.85 mols. of 35.4 per cent formalin are added over 12.5 minutes, the pressure rising to 1050 p.s.i.  After the formalin addition the mixture is cooled to below 100 DEG  C.  The resultant mixture contains 2-hydroxyethyl-5-ethyl pyridine, 2-vinyl-5-ethyl pyridine and unreacted methylethylpyridine.
Patent GB-884312-A (GB)
Title: Improvements in or relating to communication systems and line equipment therefor
Inventor: DUERDOTH WINSTON THEODORE
IPC: H04J3/12
Filed: 1959-06-23
Abstract: 884,312. Automatic exchange systems. POSTMASTER GENERAL. June 22, 1960 [June 23, 1959], No. 21559/59. Drawings to Specification. Class 40 (4). In a pulse multiplex exchange system the subscriber's pulse modulator is given a high loss at low frequencies (0-1200 c/s.) and this pulse demodulator a correspondingly high gain at these frequencies. Thus, a flat overall response is obtained for speech transmission between subscribers, but supervisory signals such as ringing current lying in the range 300-450 c/s., and modulated on pulses applied direct to the pulse highways obtain a correspondingly large gain so that adequate strength for the ringing signal applied to the subscriber's line may be achieved. The characteristic for the modulator is obtained by inserting a suitable frequency responsive network in front of the modulator and the characteristic for the demodulator is obtained by feeding the demodulator output to a transistor amplifier having a resistancecapacitance feed-back circuit. Specification 796,223 is referred to.
Patent GB-518364-A (GB)
Title: Improvements relating to the mounting of windows and like panels
IPC: E06B3/62
Filed: 1938-07-20
Abstract: 518,364. Glazing windows. DUTFIELD, A. E., RAWLINGS, E. J., and RAWLINGS MANUFACTURING CO., Ltd. July 20, 1938, No. 21578. [Class 20 (iii)] A window or like panel provided along its peripheral edges with a U- shaped rubber edging strip E is detachably retained in a metal frame A by means of a separate rubber strip F engaging at its base wholly or partly in a groove or channel D in the base of the frame and one side of which engages with the adjacent side of the U-shaped strip E. In the form shown in Fig. 1, the width of the strip E is equal to the width of the portion B of the base of the metal frame between the marginal wall thereof and the adjacent vertical wall of the channel D, but according to a modification the strip E may be wider than the portion B, the strip F being formed with a rabbet in which the corner of the strip E engages. According to further modifications, the strip E may be formed at the base with a depending portion which engages in the frame channel D, and at the top with a lip or bead which engages with the acuteangled edge at the top of the retaining'strip F. In the modification shown in Fig. 7, the edging strip is in the form of an L-shaped member with a V-shaped cut E' in the base thereof, forming a flap E<4> which is tilted into the vertical position to be engaged by the retaining strip F after the panel has been inserted in position. Specification 518,407 is referred to.
Patent GB-155880-A (GB)
Title: Improvements in files for treasury notes, cheques, postal orders, bills, vouchers, memoranda and the like
IPC: B42F9/00
Filed: 1920-06-03
Abstract: 155,880. Rose, A. June 3, 1920. Clamping - devices.- In an improved file for notes, bills, &c. of the kind having a base, back, and movable platform constantly sprung up against stops on the back, this platform is pivotally and slidably mounted at the front edge of the base. The ends of a rod 5 attached to the front edge of the platform 4 slide in guides 6 at each side of the base 1. The back edge of the platform is pressed against projecting strips 3 at each side of the back 2 by springs 8 arranged in tubes 9 and connected to the platform by guides 10 through slots in the back.
Patent GB-932719-A (GB)
Title: Improvements in manhole structures
IPC: E02D29/14
Filed: 1960-06-20
Abstract: 932,719. Road surface boxes. W. W. TAYLOR. June 20, 1960, No. 21631/60. Class 107. A manhole cover assembly comprises a cover formed of two triangular surface plates 15 each provided with three supporting lugs 36, 26 extending outwardly from the vertices of the triangle and a frame 10 with base 16 and upstanding peripheral wall 17 defining an opening of generally square section provided at diagonally opposite corners 21 with single recessed seats 25 and at its other corners 22 with double recessed seats 35 to receive the cover support lugs. The cover lugs and their frame recessed seats are correspondingly tapered in a downward direction. When the road is resurfaced the level of the cover is raised by a pair of shims 58 each formed with with two flat arms 58 connecting depending sockets 59, 60 which are tapered externally to fit within the frame recesses and tapered internally to accept the cover supporting lugs. The shims may be held in position by anchor bolts which extend through holes 65 in the base of the sockets and through bores 38, 28 provided in cross-flanges 37, 27 which extend across the bottom of recessed seats 35, 25, respectively.
Patent GB-838014-A (GB)
Title: Elastic link strap
IPC: A44C5/08
Filed: 1956-07-13
Abstract: 838,014. Bracelets. RODI & WIENENBERGER A.G. July 13, 1956 [Aug. 17, 1955], No. 21689/56. Class 43 An elastic link band comprises parallel links 2 arranged in series transversely to the length of the band and connected by members 7 engaged within transverse openings of two adjacent links and compressed by leaf springs 20 within the links. The connecting members have their backs arranged parallel to the longitudinal sides of the band links and close laterally to gaps between the band links when the band is expanded the pairs of backs being connected by a base member beneath the base surface of the links and are staggered in relation to the links and cover each gap between two adjacent band links when the band is expanded. The connecting members have inwardly extending lugs 8 and 9 one pair of which engages the ends of a leaf spring and the other pair contacts a side wall of a link. The leaf spring is bent to an obtuse angle and has a flattened apex, which contacts a side wall of a link. The links 2 comprise upper and lower shells interengaging by a projection with a notch. The slotted ends of the upper shell extend beyond the lower shell so that the backs can slidably engage in the slits. Alternatively a pair of leaf springs in each link is used, Fig. 9. The ends of the springs engage the two pairs of lugs 8 and 9. The connecting member has an inwardly arched base to which a cover 11 is secured.
Patent GB-572483-A (GB)
Title: Improvements in and relating to electrical contacts
IPC: H01H1/42
Filed: 1943-12-28
Abstract: 572,483. Two-part couplings. CARR FASTENER CO., Ltd., and WAGSTAFF, G. Dec. 28, 1943, No. 21724. [Class 38 (i)] [Also in Group XXXVII] A device for reinforcing electric contacts of the type comprising a base 1 and upstanding wings 2, consists of a length of spring wire, e.g. piano wire, bent tc form a base 4 extending diagonally across the contact base 1, with arms 5 extending upwards and inwards across the outer faces of the wings 2, the free ends 7 being bent parallel with the base. Alternatively the base 4 and arms 5 may be co-planar.
Patent GB-232489-A (GB)
Title: Improvements in machines for beading sheet metal
IPC: B21D17/04
Filed: 1924-09-15
Abstract: 232,489. Dehn, F. B., (Budd Manufacturing Co., E. G.). Sept. 15, 1924. Beading.-In a machine for beading the edges of metal plates or panels for automobile bodies &c. the shafts of the beading rolls are mounted in a head overhanging and angularly adjustable about a vertical axis on a standard, the shafts being driven from a motor mounted on the head so as to be balanced thereon. The shafts 16, 22 of the beading rolls 17, 23 are mounted in arms 12, 21, which are secured together by a strap 45 and bolts 46 and angularly adjustable in a socket 11 on a standard 10. The arm 12 is connected to the standard by a bolt 15 and is held in its adjusted position by a screw 14. The driving motor 28 is mounted in alignment with the socket 11 on a pair of nuts 26, 27 and is connected to the shafts by a belt 37, spur gear 31, 24, 36, 18 and 19, 25. The belt pulley 33 is secured to the hub of the gear 31 which is rotatably mounted on the shaft 16. The driving gear is put into action by a spring-returned treadle-operated bell-crank lever 38, the arm 40 of which carries a tensioning pulley 41 and has a pin 42 mounted in a slot 44 of a brake shoe 43. When the treadle is depressed the belt 37 is tensioned and the brake released from the pulley 33 to put the machine in operation.
Patent GB-234342-A (GB)
Title: An improved mounting and means for tilting vehicle headlights
IPC: B60Q1/124
Filed: 1924-09-16
Abstract: 234,342. Evans, F. G. Sept. 16, 1924. Vehicle lamps, directing.-The headlamps 3 are carried by brackets 1, hinged to the vehicle, and are connected by cross-rods 4, one of which has a projection 4a hinged to the legs 5 of a fork slidable through the radiator 6, preferably one at each side of the water inlet 7, the cross-bar 8 of the fork being secured to an operating rod 10, extending through a keyhole slot 11 in the dashboard 12 and provided with reduced portions 15 adapted to engage the lower narrow part 16 of the slot 11 to lock the lamps in adjusted position. On disengaging the rod 10 from the part 16 of the slot by raising the rear end, the lamps 3 are returned to the normal position by springs 9.
Patent GB-1456387-A (GB)
Title: System for monitoring the contents of a liquid storage tank
IPC: G01F23/00
Filed: 1973-05-08
Abstract: 1456387 Dispensing liquids BRITISH PETROLEUM CO Ltd 24 April 1974 [8 May 1973] 21883/73 Heading A4T A monitoring system e.g. for use with liquid fuels comprises metering means 11, 22, 33 connected to a storage tank 5, 6, including means 10 for storing information regarding the quantity of liquid in the tank 5, 6 and a liquid level sensor 8, 9 in the tank 5, 6 for triggering the storing means 10 as the level in the tank falls past the sensor 8, 9. Preferably two tanks 5, 6 supply respective dispensing pumps 1, 3, a third pump 2 supplying a mixed grade. When the tanks 5, 6 are full, fuel dispensed by the pumps 1-3 is metered by counting pulses from pulse transmitters 11, 22, 33, whose outputs are fed to totalizing means in an electronics unit 10, which may transmit information to a central inventory control point (not shown). When the level in the tanks 5, 6 falls below the levels indicated by the sensors 8, 9 each corresponding to a predetermined remaining quantity of liquid, the totalized outputs of the respective transmitters 11, 22, 33 at that point are recorded and stored in the unit 10. Thus, as dispensing continues, the quantities remaining at any time can be indicated from the stored value, the instantaneous totalized putput, and the predetermined quantity.
Patent GB-517304-A (GB)
Title: Improvements in operating mechanisms for oil circuit breakers
IPC: H01H33/32
Filed: 1938-07-23
Abstract: 517,304. Oi1- break switches; actuation of switches. COX, H. E., and BRITISH THOMSONHOUSTON CO., Ltd. July 23, 1938, No. 21895. [Class 38 (v)] In order to obtain extra-high speed of fault clearance with oil circuit-breakers, particularly of the conventional double-break type, the opening force of the spring E stressed during the closing movement is augmented, during at least the initial part of the opening stroke, by compressed-gas operated means which is controlled by a valve M actuated by a solenoid N simultaneously with the tripping of the breaker by a trip coil in the closing mechanism D which may be common to all phases. If the gas-supply fails, the springs are sufficient to clear faults up to the breaker-rating, but at a lower speed. The Figure shows one phase A only, having a solenoid, pneumatic, motor, or other closing mechanism D, which operates each phase through mechanism comprising a shaft C and linkage B. When the breaker is tripped, air from pipe L passes into cylinder G above a piston K, which assists the common opening spring E in driving the lift-rod T downwards. The piston rod rests on top of rod T and its stroke is relatively short so that only the initial opening movement is affected.
Patent GB-858416-A (GB)
Title: Improvements in x-ray tubes
IPC: H01J35/08
Filed: 1956-07-16
Abstract: 858,416. X-ray tubes. ELY, R. E. V. Sept. 13, 1957 [July 16, 1956], No. 21897/56. Class 39(1). In an X-ray tube comprising a target assembly including a target 5 and a stem-like support member 7, 8 which traverses the evacuated envelope of the tube and the axis of which is disposed transversely to the axis of an electronemissive assembly, the target assembly is so arranged that it can be withdrawn from the tube and also can be moved axially and/or rotated while the tube is in operation so that various portions of the target can be usefully employed. As shown the target comprises a plurality of rings of different metals and is supported by an insulating carrier 7 and a spindle 8 having a sliding seal engagement with a sleeve 15 sealed to the envelope by means of a bush 17. The motion of the target may be step-by-step or continuous and the spindle may be screw-threaded at one end. The operating potential may be applied to the target by means of a bush-like element adapted to press against the target surface as described in Specification 858,417. Windows 11 are provided for inspection and adjustment of the target and an X-ray permeable window is associated with apertures 12. Target 5 and support members 7, 8 may be hollow so that a cooling fluid may be circulated therethrough.
Patent GB-387937-A (GB)
Title: Improvements in machines for kneading, mixing or otherwise working crystallized margarine masses and other solid fats
IPC: B01F5/06
Filed: 1932-08-04
Abstract: <PICT:0387937/III/1> In the kneading, mixing, and other working of fats as by reciprocating members, propellers, or worms, the desired temperature is given to and maintained in the fat by providing across the conveyer chamber one or more partitions with a multiplicity of narrow passages for the mass and with electric, fluid, or other heating means.  For example, margarine is transported along a pipe 1 by a worm 3 on a shaft 2, and is kneaded by propellers 4, 5 formed as 4-bladed screws and co-operating with retarding arms 6; it is forced through narrow tubes 9 arranged across a drum 7 through which heating fluid is passed continuously, guide-plates being provided to direct the fluid to and fro radially in one half of the drum and to and fro peripherally in the other half.
Patent GB-855444-A (GB)
Title: Method of preparing esters of n-substituted ethylene imine carboxylic acids
IPC: C07D203/08
Filed: 1957-07-11
Abstract: Esters of N-substituted ethylene imine carboxylic acids of the general formula:  <FORM:0855444/IV(b)/1> wherein R is a triaryl methyl group and R1 is an alkyl group are prepared by inter-reacting an inorganic acid salt of a serine alkyl ester, with a triaryl methyl halide and a tertiary base, condensing the resulting N-triaryl methyl serine ester in the presence of a tertiary base with a sulphonyl halide R11 SO2 X, where X is chlorine or bromine and R11 an alkyl, aryl or aralkyl group, and cyclising the resulting O-R11 sulphonyl-N-triaryl methyl serine ester by means of a basic agent to form the desired ethylene imine carboxylic ester. The first step is preferably effected in an anhydrous solvent at below 10 DEG C., suitable bases being specified.  The reaction with the sulphonyl halide for example methyl sulphonyl chloride may be effected in the presence of a tertiary base at below 40 DEG C.  The cyclisation may be effected at 10 DEG  to 150 DEG C., using as basic agent a tertiary base, an alkali metal alcoholate or an alkali metal salt of a carboxylic acid.  The process may be effected with or without isolation of the intermediates and in the latter case, the basic agent for the cyclisation may be provided by using an excess of the tertiary base in the first step.  Examples describe the preparation of N-triphenyl methyl ethylene imine carboxylic acid methyl ester.
Patent GB-365607-A (GB)
Title: Improvements in or relating to rontgen apparatus
IPC: H05G1/58
Filed: 1930-07-21
Abstract: 365,607. R÷ntgen - ray apparatus. KOCH & STERZEL AKT.-GES., 40, Zwickauerstrasse, Dresden, Germany. July 21, 1930, No. 21975. Convention date, July 27, 1929. [Classes 98 (i).] Alternative controlling means for diagnosis and photography comprises (1) a potentiometer 16, Fig. 1, across the mains to control the voltage on the transformer primary (for diagnosis) ; (2) a series of tappings 13 on the primary (or secondary) to vary the transformer ratio (for photography) ; and (3) a change-over switch 12. The latter is provided with idle and operative con.tacts whereby the transformer is de-energized when changing over. Groups of tappings may be arranged centrally on the transformer secondary 17, Fig. 2, the controls 18, 19 therefor being normally operative by means of a spring-held bridge 20. A contact 23 on the change-over switch is arranged to energize the electromagnet 20a to cut out the tappings controls and bridge the ends 21 of the split secondary before the control 16 is brought into operation, and vice versa. Modified arrangements are described for three or multiphase working with interconnected switches. In one arrangement, Fig. 4 (not shown), two series of tapping controls are arranged, one series being for fine adjustment. The change-over switch may be arranged within the transformer, Fig. 5 (not shown).
Patent GB-862655-A (GB)
Title: Improvements in and relating to valves
IPC: F16K1/00
Filed: 1957-07-11
Abstract: 862,655. Valves. NICHOLSON, J., and NORSEN SYNDICATE Ltd. July 11, 1957, No. 22027/57. Class 135. A valve automatically opened when a prodetermined length of hose is unwound from a reel, comprises a body member 1, Fig. 1, secured at one end by a hollow nut 15 to the screw-threaded end fitting of the water supplypipe and fitted at its other end with a screwthreaded collar 9 and gland-nut 13 to retain within the body against axial movement a rotatable member 4 having a hollow spigot 8 connectible to the hose. A nut member 26 carried by a spider 27, mounted on the body coacts with a screw-threaded spindle 25 having a slot 24 which co-operates with a transverse bar formed on the nut 15 to prevent rotation of the spindle. The spindle at its inner end is formed with a recess 21 housing a spring 23 compressed by the head 20 of a stub member 19 on which the valve disc 17 is secured. The unwinding of the hose rotates the member 4 to axially move the spindle 25 to unseat the disc. Initial unwinding of the hose relieves compression in the spring 23 without the disc being unseated. In another embodiment, the member 4, Fig. 3, is internally threaded and co-operates with complementary threaded lugs 45 formed on the spindle 42. Rotation of the spindle is prevented by flats 44 which co-operate with a square hole in a transverse bar formed on the nut 15. In this case springs 43 on either side of a flange 40 on the stub member 39 are compressed when the valve disc 17 is firmly seated. Specification 528,148 is referred to.
Patent GB-469633-A (GB)
Title: The manufacture of polycyclic condensation products
Filed: 1936-08-10
Abstract: Compounds of the general formula <FORM:0469633/IV/1> (wherein one or more X's stand for substituents, two or more of which may together form another ring, and the other X's stand for hydrogen) or the corresponding benzyl compounds (the compounds employed in the parent Specification being excluded) are treated with agents suitable for splitting off hydrogen halide, such as strong alkaline agents, appropriately with the addition of high boiling tertiary bases.  The products are intermediates for dyes and pharmaceutical products.  In examples: (1) a  - phenyl - o - chlorocinnamic or a  - phenyl - o-chlorohydrocinnamic acid is heated with caustic potash and quinoline to give phenanthrene-9-carboxylic acid; (2) the condensation product from o-chlorbenzaldehyde and desoxybenzoin is treated similarly to give phenanthrene.  A sample has been furnished under Sect. 2 (5) of a naphthopyrene carboxylic acid prepared by treating as in the examples the condensation product from pyrene-3-aldehyde and o-chlorphenylacetic acid.  In the Specification as open to inspection under Sect. 91, the process of example 1 is carried out using a mixture of caustic potash and caustic soda, and the condensations of a  - (o - chlorophenyl) - cinnamic acid to phenanthrene-9-carboxylic acid, of o-chloro-cis-stilbene (made from a -phenyl-o-chlorocinnamic acid by means of quinoline and copper) to phenanthrene, of a -(o-chlorophenyl)-p-methyl-cinnamic acid to 3-methyl-phenanthrene-9-carboxylic acid, and of the condensation product from N - ethylcarbazole - 3 - aldehyde with o-chlorophenyl acetic acid to a naphthocarbazole carboxylic acid are also described. This subject-matter does not appear in the Specification as accepted.
Patent GB-773091-A (GB)
Title: Mowing machines
IPC: A01D75/30
Filed: 1954-07-28
Abstract: 773,091. Mowing machines. BORROW, E. W. July 25, 1955 [July 28, 1954], No. 22099/54. Class 6(2). A mowing machine comprises a plurality of cutting units mounted at the front of a tractor and driven by a transverse shaft operated from the power take-off of the tractor. A frame 3 is rigidly attached to the front of the tractor and supports a hollow transverse bar 1 which in turn houses a transverse rotary shaft 6 driven from the power take-off 10 of the tractor. The cutter units 16 are supported from the rotary shaft 6 and the bar 1 by parallel link mechanisms and are belt driven from the rotary shaft 6. Each unit may be connected to the hydraulic lift mechanism of the tractor through a telescopic spring-loaded suspension device 38 and a bell crank lever 37 pivoted about a transverse member 36, or alternatively the transverse bar 1 may be connected to the power lift of the tractor so as to raise the cutters as a whole from the ground.